The latest American imprisoned in North Korea, Matthew Miller, says he's working eight hours a day digging in fields and being kept in isolation, but so far his health is not deteriorating. In his first interview since being sentenced to six years in a labor camp, during which Miller is shown under close guard and has only time to answer one question, he gives a brief description of the conditions he is facing. Miller was allowed a phone call home to his family Wednesday, from Pyongyang, and spoke to his father for about nine minutes.